866 search results for "sql"

Computerworld’s list of R packages for data wrangling

May 13, 2015
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Computerworld's Sharon Machlis published today a very useful list of R packages that every R user should know. The list covers packages for data import, data wrangling, data visualization and package development, but for beginning R users the biggest challenge is usually just dealing with data. To that end, I thought it was worth listing the package for data...

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streaming machine learning with RMOA: stream_in > train > predict

streaming machine learning with RMOA: stream_in > train > predict

We will be showcasing our RMOA package at the next R User conference in Aalborg. For the R users who are unfamiliar with streaming modelling and want to be ahead of the Gartner Hype cycle or want to evaluate existing streaming machine learning models, RMOA allows to build, run and evaluate streaming classification models which are built in

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Using Azure as an R data source, Part 1

May 12, 2015
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Using Azure as an R data source, Part 1

by Gregory Vandenbrouck Software Engineer at Microsoft This post is the first in a series that covers pulling data from various Windows Azure hosted storage solutions (such as MySQL, or Microsoft SQL Server) to an R client on Windows or Linux. We’ll start with a relatively simple case of pulling data from SQL Azure to an R client on...

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Odd Connections Inside The NASDAQ-100

May 8, 2015
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Odd Connections Inside The NASDAQ-100

Distinguishing the signal from the noise requires both scientific knowledge and self-knowledge (Nate Silver, author of The Signal and the Noise) Analyzing the evolution of NASDAQ-100 stock prices can discover some interesting couples of companies which share a strong common trend despite of belonging to very different sectors. The NASDAQ-100 is made up of 107 … Continue reading...

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RStudio v0.99 Preview: More Editor Enhancements

May 6, 2015
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RStudio v0.99 Preview: More Editor Enhancements

We’ve blogged previously about various improvements we’ve made to the source editor in RStudio v0.99 including enhanced code completion, snippets, diagnostics, and an improved Vim mode. Besides these larger scale features we’ve made lots of smaller improvements that we also wanted to highlight. You can try out all of these features now in the RStudio

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Dockerizing a Shiny App

April 30, 2015
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After a long pause of more than four months, I am finally back to post here. Unfortunately, many commitments prevented me keep posting, but coming back, i changed the deployment (now this blog runs entirely within a docker container with some other cool things I intend to post more forward) and wrote this post. 1. The post

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How to Add WAR Metrics to your Lahman Database

April 30, 2015
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How to Add WAR Metrics to your Lahman Database

I get a lot of questions on how to calculate WAR in the Lahman database. In the past I’ve discussed ways to calculate wOBA and FIP in Lahman but WAR has always been difficult due to the “closed-source” nature of the calculation. But there is an answer While stumbling around on Baseball Reference one day,

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R, Python, MATLAB, & Excel Dashboards & Graphs with D3.js & WebGL

April 29, 2015
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R, Python, MATLAB, & Excel Dashboards & Graphs with D3.js & WebGL

Web tools like D3.js and WebGL let you make beautiful, interactive 2D and 3D graphs. You can now publish graphs and dashboards with these technologies using Python, R, MATLAB, & Excel. Publishing and sharing is one extra line of code. This post puts you on your way, no downloads or installations required. We’ll start with ggplot2; scroll to see Python and MATLAB plots in 2D and 3D. See our

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Time Series Graphs & Eleven Stunning Ways You Can Use Them

April 22, 2015
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Time Series Graphs & Eleven Stunning Ways You Can Use Them

Many graphs use a time series, meaning they measure events over time. William Playfair (1759 - 1823) was a Scottish economist and pioneer of this approach. Playfair invented the line graph. The graph below–one of his most famous–depicts ho...

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R vs QGIS for sustainable transport planning

April 19, 2015
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R vs QGIS for sustainable transport planning

The 23rd iteration of the GIS Research UK conference (#GISRUK) conference was the largest ever. 250 researchers, industry representatives and academics attended from the vibrant geospatial research communities in the UK, Europe and beyond. GISRUK has become a centrepoint for discussion of new methods, software and applications in the field. I was on the organising committee, reviewed some excellent papers for the event (a full list...

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